In this video, I wanted to take you on a tour around our greenhouse to show you exactly how we are able to start around 15,000 seedlings each year from a tiny 6x10' backyard greenhouse! Most market gardeners (or even backyard gardeners with large spaces) will have a larger greenhouse than this, but we are able to maximize this space in two ways:
1) soil blocking, which is a major space saver
2) succession planting our seedlings

Why did we keep the greenhouse small? We knew we wanted it to be as EFFICIENT as possible, which would make it easier and more affordable to heat (as well as having a smaller footprint ecologically). We use a portable electric heater to keep the temperatures right for germinating and growing seedlings, with a backup wifi thermometer and temperature sensor to help regulate.

Using the mini soil blocks on wire baker's shelves means we can fit 1,600 on one shelf--and while we don't always have the greenhouse that full, we could grow even MORE than 15,000 seedlings in here if we needed to!

The point is, it's not necessary to have a fancy or huge greenhouse in order to grow the garden of your dreams. Start small and maximize that greenhouse space!